Features: * Fits most Holmes, GE, Honeywell, and Bionaire humidifiers * Metal reinforcement * Adds rigidity to shape of the wick filter when moistened * Also adds stability with today"s softer, more absorbent paper * Prevents "slumping" or "sagging" over time or when wet * Helps maintain the humidifier"s designed output What"s In The Box: * Bestair ALL-2 Universal Humidi-Wick Humidifier Filter